古代小说中有这样一则饶有趣味的故事:甲乙两人因故斗殴,甲咬掉了乙的鼻子,被人绑到衙门,甲百般抵赖,并说是乙自己把鼻子咬掉的。知县敲着醒木厉声呵斥道:“口在下,鼻在上,他能咬掉自己的鼻子吗?”甲狡辩说:“他是站在床上咬的!”知县闻之竟半天转不过弯来。其实,这里甲的判断“乙之所以会咬掉自己的鼻子,是因为他站在床上”,这是违反思维的四大规律“充足理由律”的。 There is such an interesting story in the ancient novels: A and B were brawl for any reason, B bit off B's ​​nose, was tied to the Yamen, Nabatai denied that B is his own nose to bite off. Known wake up awake awakened magistrate shouted: “mouth under the nose on, he can bite his nose?” A sophistry said: “He is standing in bed bite!” . In fact, here a judge, “B reason why he will bite his nose because he stood in bed,” This is a violation of the four rules of thinking, “ample grounds for law.”